Still reeling from the loss of Felicity's boyfriend and the apparent return of Laurel Lance from the dead, Team Arrow will redouble their efforts to track down Prometheus, the serial killer who has been terrorizing Star City as a way of getting back at Oliver, apparently for having killed his father as "The Hood" back in the show's first season.
There's also a new quest set up to find the person who trained Oliver (likely Talia Head/al Ghul); Diggle's storyline is headed for a trial date; and a new ally will apparently join the fray in the quest to clear his name.
You can check the solicitation out below.
OLIVER WANTS JUSTICE; FELICITY WANTS REVENGE — Worried that Prometheus is right and he is truly a killer at heart, Oliver (Stephen Amell) looks for any ray of hope and finds it in what seems to be the miraculous return of Laurel Lance (guest star Katie Cassidy).
However, Felicity (Emily Bett Rickards), still reeling from Detective Malone’s murder, is bent on revenge – she wants to stop Prometheus at any cost. While in prison, Diggle (David Ramsey) fights for his life.
Gregory Smith directed the episode written by Ben Sokolowski & Brian Ford Sullivan.
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Arrow airs Wednesday nights at 8 p.m. ET/PT on The CW. "Who Are You?" debuts on January 25, 2017.